<template>
	<view class="goods-detail-container">
		<!-- 轮播图 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item,i) in goods_info.pics" :key='i'>
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<view class="price">￥{{goods_info.goods_price}}</view>
			<view class="goods-info-body">
				<!-- 商品名称 -->
				<view class="goods-name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<view class="yf">快递：免运费{{a}}</view>
		</view>
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		<view class="goods-nav">
			<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
				@buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	// 按需导入 mapMutations 这个辅助方法
	import {
		mapMutations,
		mapGetters
	} from 'vuex'
	export default {
		data() {
			return {
				goods_info: {},
				options: [{
					icon: 'shop',
					text: '店铺',
				}, {
					icon: 'cart',
					text: '购物车',
					info: 0
				}],
				buttonGroup: [{
						text: '加入购物车',
						backgroundColor: '#ff0000',
						color: '#fff'
					},
					{
						text: '立即购买',
						backgroundColor: '#ffa200',
						color: '#fff'
					}
				]
			};
		},
		computed: {
			// 调用 mapState 方法，把 m_cart 模块中的 cart 数组映射到当前页面中，作为计算属性来使用
			// ...mapState('模块的名称', ['要映射的数据名称1', '要映射的数据名称2'])
			// ...mapState('m_cart', ['a']),
			...mapGetters('m_cart', ['total'])
		},
		onLoad(options) {
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		methods: {
			// 把 m_cart 模块中的 addToCart 方法映射到当前页面使用
			...mapMutations('m_cart', ['addCart']),
			buttonClick(e) {
				// console.log(e)
				if (e.content.text === '加入购物车') {
					const {
						goods_id,
						goods_name,
						goods_price,
						goods_small_logo
					} = this.goods_info
					
					const goods = {
						goods_price:goods_price,
						goods_id:goods_id,
						goods_name:goods_name,
						goods_small_logo:goods_small_logo,
					    goods_stare: true,
						goods_count: 1
					}
					this.addCart(goods)
				} else {
					uni.switchTab({
						url: "/pages/cate/cate"
					})
				}
			},
			onClick(e) {
				// console.log(e)
				if (e.content.text === '购物车') {
					uni.switchTab({
						url: "/pages/cate/cate"
					})
				}
			},
			preview(i) {
				// console.log(i)
				uni.previewImage({
					current: i,
					urls: this.goods_info.pics.map(v => v.pics_big)
				})
			},
			async getGoodsDetail(goods_id) {
				const {
					data: {
						message,
						meta
					}
				} = await uni.$http.get('/api/public/v1/goods/detail', {
					goods_id
				})
				if (meta.status !== 200) return uni.$showMsg()
				this.goods_info = message
				this.goods_info.goods_introduce = message.goods_introduce.replace(/<img/g,
					'<img style="display:block;" ')
				// console.log(message)
			}
		},
		watch: {
			total: {
				handler(newVal) {
					const findResult = this.options.find(x => x.text === '购物车')
					if (findResult) {
						// 3. 动态为购物车按钮的 info 属性赋值
						findResult.info = newVal
					}
				},
				// immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
				immediate: true
			},
		}
	}
</script>

<style lang="scss">
	.goods-detail-container {
		border-bottom: 50px;
	}

	.goods-nav {
		position: fixed;
		bottom: 0px;
		left: 0px;
		right: 0px;
	}

	swiper {
		height: 750rpx;

		image {
			width: 100%;
			height: 100%;
		}
	}

	// 商品信息区域的样式
	.goods-info-box {
		padding: 10px;
		padding-right: 0;

		.price {
			color: #c00000;
			font-size: 18px;
			margin: 10px 0;
		}

		.goods-info-body {
			display: flex;
			justify-content: space-between;

			.goods-name {
				font-size: 13px;
				padding-right: 10px;
			}

			// 收藏区域
			.favi {
				width: 120px;
				font-size: 12px;
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				border-left: 1px solid #efefef;
				color: gray;
			}
		}

		// 运费
		.yf {
			margin: 10px 0;
			font-size: 12px;
			color: gray;
		}
	}
</style>
